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Horizons Inspired
Author:
John Golden
Love Geometry Daily today: Horizons, #520
http://geometrydaily.tumblr.com/post/124067965169/520-horizons-you-can-get-this-a-hand-made
Just needed to mess around with the symmetries a bit.
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探究由平行線和截線所成的角
alg2_05_05_01_applet_exp_flvs
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